JP3600909B2 - Lifting jig with cleaning device for work rod - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The invention of the present application is used for screw rods used for pile building with injection of chemical liquid such as cement milk, stirring rods used for ground improvement etc. by injection of chemical liquid, and for adding and separating various other working rods, etc. The present invention relates to a lifting jig provided with a means for cleaning and removing a residual chemical solution after injecting a chemical solution through a chemical solution supply passage vertically passed through the working rod.
[0002]
[Prior art]
Conventionally, for example, in a pre-boring method, after drilling a vertical hole of a predetermined depth by a screw rod of an earth auger excavator, cement milk is vertically drilled from the lower end of the screw rod through a chemical solution supply path vertically passed through the screw rod. And then agitated and mixed with the excavated earth and sand. Then, the cleaning water was pumped into the chemical supply path to wash the cement milk remaining in the chemical supply path, and discharged from the lower end of the screw rod into the vertical hole. The screw rod is pulled out of the vertical hole to perform a cleaning operation of the chemical supply path, and thereafter, the existing pile is inserted into the vertical hole.
[0003]
However, in the conventional chemical supply path cleaning method as described above, the predetermined water-cement ratio of the cement milk previously injected into the vertical hole is changed, and the intended design strength may not be achieved, and the injection pressure of the washing water, or to dissipate the cement milk that much trouble to penetrate into the surrounding ground of the vertical hole, was Tsu drawback there, such as to rise to the collapse of the pore walls.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to eliminate the conventional disadvantages.
[0005]
[Means for achieving the object]
To achieve the above object, the present invention provides:
A lifting jig having an upper end portion of a working rod vertically traversed through a chemical solution supply passage and a joint that can freely contact and separate,
A plurality of chemical supply paths are vertically passed through the work rod, a plurality of water supply guide paths to be respectively communicated with the plurality of chemical liquid supply paths are provided in the lifting jig body, and the plurality of water supply guide paths are respectively washed. A plurality of washing water supply pipes for pumping water were connected,
We propose a lifting jig with a washing device for working rods.
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0006]
【Example】
First , as an example of a working rod on which the lifting jig (1) is to be used, a screw rod (A) of an earth auger excavator has a hexagonal cylinder male joint (a) at the upper end of the rod as shown in FIG. ) Is protruded coaxially, and as a chemical solution supply passage, a drilling head (b) at the lower end through a hollow portion of the male joint (a) through a hollow portion of the screw rod (A) (FIG. 4) and one supply path (c) passing through the chemical solution discharge port. (D) and (d) are cotter pin grooves of the male joint.
[0007]
As shown in FIG. 1A, the lifting jig (1) has a hexagon socket female joint which can be fitted and detached from the male joint (a) of the screw rod (A) on the lower surface of the jig main body (2). (3) is coaxially connected with the opening directed downward, and a suspension ring (4) is protruded from the upper surface, and a radius is set inside the main body (2) from the side surface of the main body (2). And a key-shaped water supply guideway (5) is formed along the axis of the body (2) to open the bore of the female joint (3), and the main body (2) of the guideway (5) is opened. ) An L-shaped pipe (6) is fitted into the opening of the side wall, and a long cleaning water supply pipe (8) composed of a flexible hose is connected to the L-shaped pipe (6) via a detachable coupling (7). I have. (9) and (9) are cotter pin holes of the female joint.
[0008]
The other end of the cleaning water supply pipe (8) is connected to a water storage tank (11) via a pump (10) as shown in FIG.
[0009]
The operation of the lifting jig of the above example will be described together with a usage example. First, the lifting jig (1) is suspended from a wire (f) of the crane (E) in FIG. 4 via a suspension ring (4). Using an earth auger excavator equipped with the screw rod (A), a vertical hole is excavated while a required number of the screw rods (A) are added to perform a pre-boring method, and then the screw rod (A) After the cement milk is injected into the vertical hole through the chemical solution supply path (c), the screw rod (A) is separated from the excavator, and is replaced with the male joint (a) of the uppermost screw rod (A). Then, the female joint (3) of the lifting jig (1) is fitted, and a cotter pin is driven into the pin holes (9), (9) and the pin grooves (d), (d) for connection. Then, the uppermost screw rod (A) is pulled up together with the lifting jig (1) by hoisting the wire (f) of the crane, and is separated from the next screw rod.
[0010]
The lifted screw rod (A) is moved vertically to a position appropriately separated from the vertical hole, and the cleaning water in the tank (11) is supplied by a pump (10) as shown in FIG. 8) The water is fed under pressure into the water supply guideway (5) in the jig body (2), whereby the cleaning water flows from the guideway (5) into the chemical solution supply path (c) of the screw rod (A). The cement milk that has been sent and remains in the supply path (c) is washed away and discharged from the lower end to the ground. In the same manner, the screw rods that have been added in the same manner are sequentially lifted one by one and cleaned.
[0011]
The cleaning operation described above does not affect the inside of the well into which the cement milk has been injected.
[0012]
In the embodiment of this embodiment shown in FIG. 2A, as shown in FIG. 2B, the same chemical liquid supply path (c20) as the above-mentioned chemical liquid supply path (c) and a longitudinally extending inside thereof. A lifting jig (21) to be used for lifting a screw rod (A20) having a double supply path with a chemical supply path (g20) formed concentrically by a pipe, and a water supply guide path (5) in the above example. ) And a water supply guideway (33) concentrically formed by a water supply guideway (25) and a pipe (32) vertically penetrated therein, and a lower end portion of the pipe (32). Is slightly protruded from the upper end of the opening of the chemical solution supply passage (g20) of the screw rod (A20) so as to be detachable, and a pipe (34) communicating with the upper end of the water supply guide passage (33) is connected to the jig body ( 22) and is flexible to the tube (34) via a detachable coupling (35). The other end of the supply pipe (36) is connected to a water tank via a pump together with the other wash water supply pipe (28) by a pump. Is substantially the same as FIG. According to this example, if the lifting jig (21) is connected to the male joint (a20) of the screw rod (A20) having the above-mentioned double chemical solution supply paths (c20) and (g20), the cleaning supply pipe (28) , (36) can be washed by pumping the cleaning water into both chemical solution supply paths (c20) and (g20).
[0013]
Still another embodiment shown in FIG. 3 is that, in the same water supply guide paths (45) and (53) as in FIG. 2 (a), another guide path is formed in a pipe (52) forming the guide path (53). An opening (57) communicating with (45) is provided, and the upper end of the guide path (53) is closed to close the pipe (34), the coupling (35), and the cleaning water supply pipe (36) in FIG. 2) is omitted, and the other structure is substantially the same as FIG. According to this example, the cleaning water pumped by one cleaning water supply pipe (48) is diverted to one of the water supply guide paths (45) and the other guide path (53) through the opening (57). Then, they are pressure-fed to the two chemical supply paths of the screw rod, respectively.
[0014]
A lifting jig for a screw rod having three or four chemical liquid supply paths can be obtained by appropriately changing the design according to the above-described examples.
[0015]
【The invention's effect】
According to the lifting jig with a cleaning device for a working rod of the present invention, the working rod that has performed the operation of injecting a chemical such as cement milk through the chemical liquid supply path is lifted by the lifting jig of the present invention, and is appropriately separated from the work position. Then, if the washing water is sent from the washing water supply pipe, the washing water is automatically sent straight into the chemical supply path of the working rod, and the remaining chemical liquid such as cement milk can be washed out to the above-mentioned appropriate place. Thus, the conventional disadvantage can be solved.
[Brief description of the drawings]
FIG. 1A is a vertical sectional front view of a lifting jig according to the present invention.
(B) A partially cutaway front view of the upper end of the screw rod to which the lifting jig is to be connected.
FIG. 2 (a) is a longitudinal sectional front view of another embodiment of the lifting jig.
(B) A partially cutaway front view of the upper end of the screw rod to which the lifting jig is to be connected.
FIG. 3 is a vertical sectional front view of still another embodiment of the lifting jig.
FIG. 4 is a schematic diagram of a cleaning process.
[Explanation of symbols]
1, 21, 41 Lifting jigs 2, 22, 42 Jig body 5, 25, 33, 45, 53 Water supply guide paths 8, 28, 36, 48 Cleaning water supply paths A, A20 Screw rods c, c20, g20 Chemical supply path

Claims (2)

A lifting jig having an upper end portion of a working rod vertically traversed through a chemical solution supply passage and a joint that can freely contact and separate,
A plurality of chemical supply paths are vertically passed through the work rod, a plurality of water supply guide paths to be respectively communicated with the plurality of chemical liquid supply paths are provided in the lifting jig body, and the plurality of water supply guide paths are respectively washed. A plurality of washing water supply pipes for pumping water were connected,
Lifting jig with cleaning device for work rod. A lifting jig having an upper end portion of a working rod vertically traversed through a chemical solution supply passage and a joint that can freely contact and separate,
A plurality of chemical supply paths are vertically passed through the work rod, a plurality of water supply guide paths to be respectively communicated with the plurality of chemical liquid supply paths are provided in the lifting jig main body, and the plurality of water supply guide paths are provided with washing water. A lifting jig with a washing device for a working rod, to which one washing water supply pipe for split pressure feeding is connected.

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